It has also been learnt that the same firmware is deployed to Xperia ZL and Tablet Z, reported Xperia Blog.

The new Android 5.0.2 Lollipop will bring in the new design language, "Material Design", with interactive user interface, lots of animation graphics, lock-screen notification options and the replacement of Dalvik with ART as its default runtime will bring improvement in performance-and-battery-life enhancement and many more features.

Few other noteworthy improvements include option to transfer apps from phone's flash memory to SD card and multi-user profiles (work, private & guest).

Sony is yet to officially confirm the news, but it did announce that the company is releasing a new stability update for Xperia Z1, Xperia Z1 Compact, and Xperia Z Ultra devices. This software patch is similar to one deployed to Xperia Z3 and Z2 series early this month.

As per the official change-log entry, it brings fixes to the no-service bug found in Lockscreen (and Homescreen), smooth transfer of apps from phone memory to SD card and performance enhancements.

How to Install software update on smartphones via OTA [Over-The-Air]:

If Xperia Z series device owners are getting the update notifications, they must select "Yes, Download" option. After downloading, select >> "Install now". The phone will restart automatically and the OS will be updated to the new version.

We would like to remind our readers that the roll-out process is carried out in phases, so it will take some time to reach all corners of the world.